PPL multiple entry points (#8717)

* Multiple entry points for main package.

* MEP for firestore lite building

* Fix issue with external exports

* Refactor to support multiple entry points for the lite SDK. Fixes import issues and makes code organization across /pipelines and /lite/pipeliens

* Type and comment cleanup

* Make PipelineSource generic and remove useFluentPipelines

* Remove converter and placeholders for converter.

* cleanup: remove documentReferenceFactory

* Linting and formatting

* Update the typings export for pipelines and lite pipelines so that it auguments the Firestore and Query classes.

* Add missing Expr export

* Lint fixes

* TODOs cleanup

* update api review

* Query to Proto with integration tests

* API tweaks from review. Selectable, FilterCondition, and Accumulator are abstract classes not interfaces. Removed extraneous Pipeline.sort overload

* Remove console.log statements from prune-dts.ts

* code cleanup in prune-dts

* Add missing imports to pipelines.ts

Author: MarkDuckworth

common/api-review/firestore-lite-pipelines.api.md

@@ -1310,7 +1310,11 @@ export function like(left: Constant, pattern: Constant): Like;
 
 // @beta (undocumented)
 export class Limit implements Stage {
-    constructor(limit: number);
+    constructor(limit: number, convertedFromLimitTolast?: boolean);
+    // (undocumented)
+    readonly convertedFromLimitTolast: boolean;
+    // (undocumented)
+    readonly limit: number;
     // (undocumented)
     name: string;
 }
@@ -2204,8 +2208,8 @@ export function xor(left: FilterExpr, ...right: FilterExpr[]): Xor;
 
 // Warnings were encountered during analysis:
 //
-// /home/runner/work/firebase-js-sdk/firebase-js-sdk/packages/firestore/dist/lite/index.d.ts:9238:9 - (ae-incompatible-release-tags) The symbol "accumulators" is marked as @public, but its signature references "AccumulatorTarget" which is marked as @beta
-// /home/runner/work/firebase-js-sdk/firebase-js-sdk/packages/firestore/dist/lite/index.d.ts:9239:9 - (ae-incompatible-release-tags) The symbol "groups" is marked as @public, but its signature references "Selectable" which is marked as @beta
-// /home/runner/work/firebase-js-sdk/firebase-js-sdk/packages/firestore/dist/lite/index.d.ts:9268:9 - (ae-incompatible-release-tags) The symbol "orderings" is marked as @public, but its signature references "Ordering" which is marked as @beta
+// /Users/markduckworth/projects/firebase-js-sdk/packages/firestore/dist/lite/index.d.ts:9239:9 - (ae-incompatible-release-tags) The symbol "accumulators" is marked as @public, but its signature references "AccumulatorTarget" which is marked as @beta
+// /Users/markduckworth/projects/firebase-js-sdk/packages/firestore/dist/lite/index.d.ts:9240:9 - (ae-incompatible-release-tags) The symbol "groups" is marked as @public, but its signature references "Selectable" which is marked as @beta
+// /Users/markduckworth/projects/firebase-js-sdk/packages/firestore/dist/lite/index.d.ts:9269:9 - (ae-incompatible-release-tags) The symbol "orderings" is marked as @public, but its signature references "Ordering" which is marked as @beta
 
 ```