Add basics of Chrome Devtools debugger support

- Use routing table for request dispatch in DebuggerHttpRouter, for
  handling choosing which debugger stack to use based on the http
  upgrade request:
    - DebuggerEscargot for the python debugger and VSCode
    - DebuggerDevtools for connecting to Chrome Devtools
- Parse mesasges with 16bit message size
- Reply to the first few messages chrome sends
- Refactor Debugger:
    - Rename DebuggerRemote to DebuggerEscargot
    - DebuggerEscargot and DebuggerDevtools inherit from
      DebuggerTcp which inherits from Debugger

Co-authored-by: Roland Takacs <roland.takacs@h-lab.eu>
Signed-off-by: Máté Tokodi <mate.tokodi@szteszoftver.hu>

Author: matetokodi

src/api/EscargotPublic.cpp

@@ -1984,6 +1984,7 @@ bool DebuggerOperationsRef::updateBreakpoint(WeakCodeRef* weakCodeRef, uint32_t
 
 class DebuggerC : public Debugger {
 public:
+    virtual void init(const char* options, Context* context) override;
     virtual void parseCompleted(String* source, String* srcName, size_t originLineOffset, String* error = nullptr) override;
     virtual void stopAtBreakpoint(ByteCodeBlock* byteCodeBlock, uint32_t offset, ExecutionState* state) override;
     virtual void byteCodeReleaseNotification(ByteCodeBlock* byteCodeBlock) override;
@@ -3385,7 +3386,7 @@ void ContextRef::throwException(ValueRef* exceptionValue)
     toImpl(this)->throwException(s, toImpl(exceptionValue));
 }
 
-bool ContextRef::initDebugger(DebuggerOperationsRef::DebuggerClient* debuggerClient)
+bool ContextRef::initDebuggerClient(DebuggerOperationsRef::DebuggerClient* debuggerClient)
 {
 #ifdef ESCARGOT_DEBUGGER
     Context* context = toImpl(this);
@@ -3414,10 +3415,10 @@ bool ContextRef::disableDebugger()
 #endif
 }
 
-bool ContextRef::initDebuggerRemote(const char* options)
+bool ContextRef::initDebugger(const char* options)
 {
 #ifdef ESCARGOT_DEBUGGER
-    return toImpl(this)->initDebuggerRemote(options);
+    return toImpl(this)->initDebugger(options);
 #else /* !ESCARGOT_DEBUGGER */
     return false;
 #endif /* ESCARGOT_DEBUGGER */

src/api/EscargotPublic.h

@@ -950,11 +950,11 @@ class ESCARGOT_EXPORT ContextRef {
     bool canThrowException();
     void throwException(ValueRef* exceptionValue);
 
-    bool initDebugger(DebuggerOperationsRef::DebuggerClient* debuggerClient);
+    bool initDebuggerClient(DebuggerOperationsRef::DebuggerClient* debuggerClient);
     bool disableDebugger();
     // available options(separator is ';')
     // "--port=6501", default for TCP debugger
-    bool initDebuggerRemote(const char* options);
+    bool initDebugger(const char* options);
     bool isDebuggerRunning();
     bool isWaitBeforeExit();
     void printDebugger(StringRef* output);