Correct spelling in comments across multiple files

[bearroleplay]

Summary

Fixed spelling errors in comments and one debug output string across multiple files (4 commits):

Commit 1: Update CChat.cpp

• Fixed comment: "theres" → "there's"

Commit 2: Update CCommands.cpp

• Fixed comment: "seperate" → "separate"

Commit 3: Update CCore.cpp

• Fixed comment: "approrpiate" → "appropriate"

Commit 4: Update CCrashDumpWriter.cpp

• Fixed comment: "Cant" → "Can't"
• Fixed debug output: "failrd" → "failed" (line 1565)

Motivation

These typos were found while reading the code. Fixing them improves code readability and maintains professional standards. The debug output fix ensures error messages are correctly spelled.

Test plan

• Changes are in comments and one debug message string
• No functional code changes were made
• The project compiles successfully with these changes
• The debug output now displays the correct spelling ("failed" instead of "failrd")

Checklist

• Your code should follow the coding guidelines.
• Smaller pull requests are easier to review. If your pull request is beefy, your pull request should be reviewable commit-by-commit.