Support forced language mode for snippets (#2830)

Today in Cursorless using a community snippet with a forced language
mode doesn't work.

I also cleaned up the code somewhat uncreated a separate snippet
directory.

Fixes #2828

## Release notes
Forcing a language mode in community now works with snippets in
Cursorless.

---------

Co-authored-by: Phillip Cohen <[email protected]>

Author: AndreasArvidsson

cursorless-talon/src/command.py

@@ -99,7 +99,9 @@ def make_serializable(value: Any) -> Any:
             **{
                 k: v
                 for k, v in vars(type(value)).items()
-                if not k.startswith("_") and not isinstance(v, property)
+                if not k.startswith("_")
+                and not isinstance(v, property)
+                and not isinstance(v, staticmethod)
             },
             **value.__dict__,
         }

cursorless-talon/src/cursorless.talon

@@ -24,6 +24,12 @@ tag: user.cursorless
 <user.cursorless_wrapper_paired_delimiter> {user.cursorless_wrap_action} <user.cursorless_target>:
     user.private_cursorless_wrap_with_paired_delimiter(cursorless_wrap_action, cursorless_target, cursorless_wrapper_paired_delimiter)
 
+{user.cursorless_insert_snippet_action} {user.snippet} <user.cursorless_destination>:
+    user.private_cursorless_insert_community_snippet(snippet, cursorless_destination)
+
+{user.snippet_wrapper} {user.cursorless_wrap_action} <user.cursorless_target>:
+    user.private_cursorless_wrap_with_community_snippet(snippet_wrapper, cursorless_target)
+
 {user.cursorless_show_scope_visualizer} <user.cursorless_scope_type> [{user.cursorless_visualization_type}]:
     user.private_cursorless_show_scope_visualizer(cursorless_scope_type, cursorless_visualization_type or "content")
 {user.cursorless_hide_scope_visualizer}:

cursorless-talon/src/snippets.py

@@ -1,13 +1,39 @@
 from dataclasses import dataclass
 
-from .targets.target_types import CursorlessDestination, CursorlessTarget
+from ..targets.target_types import CursorlessDestination, CursorlessTarget
+
+# Scope types
 
 
 @dataclass
 class ScopeType:
     type: str
 
 
+def to_scope_types(scope_types: str | list[str]) -> list[ScopeType]:
+    if isinstance(scope_types, str):
+        return [ScopeType(scope_types)]
+    return [ScopeType(st) for st in scope_types]
+
+
+# Community types
+
+
+@dataclass
+class CommunityInsertionSnippet:
+    body: str
+    languages: list[str] | None = None
+    scopes: list[str] | None = None
+
+
+@dataclass
+class CommunityWrapperSnippet:
+    body: str
+    variable_name: str
+    languages: list[str] | None
+    scope: str | None
+
+
 # Insertion snippets
 
 
@@ -19,6 +45,19 @@ class CustomInsertionSnippet:
     languages: list[str] | None
     substitutions: dict[str, str] | None
 
+    @staticmethod
+    def create(
+        snippet: CommunityInsertionSnippet,
+        substitutions: dict[str, str] | None = None,
+    ):
+        return CustomInsertionSnippet(
+            snippet.body,
+            to_scope_types(snippet.scopes) if snippet.scopes else None,
+            # languages will be missing if the user has an older version of community
+            snippet.languages if hasattr(snippet, "languages") else None,
+            substitutions=substitutions,
+        )
+
 
 @dataclass
 class ListInsertionSnippet:
@@ -45,6 +84,16 @@ class CustomWrapperSnippet:
     scopeType: ScopeType | None
     languages: list[str] | None
 
+    @staticmethod
+    def create(snippet: CommunityWrapperSnippet):
+        return CustomWrapperSnippet(
+            snippet.body,
+            snippet.variable_name,
+            ScopeType(snippet.scope) if snippet.scope else None,
+            # languages will be missing if the user has an older version of community
+            snippet.languages if hasattr(snippet, "languages") else None,
+        )
+
 
 @dataclass
 class ListWrapperSnippet:
@@ -57,21 +106,3 @@ class WrapperSnippetAction:
     name = "wrapWithSnippet"
     snippetDescription: CustomWrapperSnippet | ListWrapperSnippet
     target: CursorlessTarget
-
-
-# Community types
-
-
-@dataclass
-class CommunityInsertionSnippet:
-    body: str
-    languages: list[str] | None = None
-    scopes: list[str] | None = None
-
-
-@dataclass
-class CommunityWrapperSnippet:
-    body: str
-    variable_name: str
-    languages: list[str] | None
-    scope: str | None