fix: correct click-to-mcp install advice to working git+ URL (#43)

click-to-mcp is not published on PyPI (pip install click-to-mcp -> 'No
matching distribution found'), so the runtime error messages that tell
users to 'pip install click-to-mcp' are wrong and leave them stuck.
This restores the git+ install form (previously added in a5874e0 and
accidentally reverted by aa004b0) across cli.py and mcp_server.py.

Reviewed and approved by council_gate_code_edit (APPROVE).

Co-authored-by: senior-dev-rotation-B <agent@cowork-ops.local>

Author: Coding-Dev-Tools

src/deploydiff/cli.py

@@ -271,7 +271,7 @@ def mcp() -> None:
         from .mcp_server import run_for_app
     except ImportError as exc:
         console.print(
-            "[red]Error: click-to-mcp is not installed.[/red]\nInstall it with: [bold]pip install click-to-mcp[/bold]"
+            "[red]Error: click-to-mcp is not installed.[/red]\nInstall it with: [bold]pip install git+https://github.com/Coding-Dev-Tools/click-to-mcp.git[/bold]"
         )
         raise SystemExit(1) from exc
 

src/deploydiff/mcp_server.py

@@ -19,7 +19,7 @@ def run_mcp() -> None:
         import sys
 
         print(
-            "Error: click-to-mcp is not installed. Install it with: pip install click-to-mcp",
+            "Error: click-to-mcp is not installed. Install it with: pip install git+https://github.com/Coding-Dev-Tools/click-to-mcp.git",
             file=sys.stderr,
         )
         sys.exit(1)
@@ -37,7 +37,7 @@ def run_for_app(app: object) -> None:
         import sys
 
         print(
-            "Error: click-to-mcp is not installed. Install it with: pip install click-to-mcp",
+            "Error: click-to-mcp is not installed. Install it with: pip install git+https://github.com/Coding-Dev-Tools/click-to-mcp.git",
             file=sys.stderr,
         )
         sys.exit(1)