fix: replace hardcoded ~/.hermes with display_hermes_home() in agent-facing text (#10285)

Tool schema descriptions and tool return values contained hardcoded
~/.hermes paths that the model sees and uses. When HERMES_HOME is set
to a custom path (Docker containers, profiles), the agent would still
reference ~/.hermes — looking at the wrong directory.

Fixes 6 locations across 5 files:
- tools/tts_tool.py: output_path schema description
- tools/cronjob_tools.py: script path schema description
- tools/skill_manager_tool.py: skill_manage schema description
- tools/skills_tool.py: two tool return messages
- agent/skill_commands.py: skill config injection text

All now use display_hermes_home() which resolves to the actual
HERMES_HOME path (e.g. /opt/data for Docker, ~/.hermes/profiles/X
for profiles, ~/.hermes for default).

Reported by: Sandeep Narahari (PrithviDevs)

tools/skills_tool.py

@@ -69,7 +69,7 @@ Usage:
 import json
 import logging
 
-from hermes_constants import get_hermes_home
+from hermes_constants import get_hermes_home, display_hermes_home
 import os
 import re
 from enum import Enum
@@ -408,7 +408,7 @@ def _gateway_setup_hint() -> str:
 
         return GATEWAY_SECRET_CAPTURE_UNSUPPORTED_MESSAGE
     except Exception:
-        return "Secure secret entry is not available. Load this skill in the local CLI to be prompted, or add the key to ~/.hermes/.env manually."
+        return f"Secure secret entry is not available. Load this skill in the local CLI to be prompted, or add the key to {display_hermes_home()}/.env manually."
 
 
 def _build_setup_note(
@@ -666,7 +666,7 @@ def skills_list(category: str = None, task_id: str = None) -> str:
                     "success": True,
                     "skills": [],
                     "categories": [],
-                    "message": "No skills found. Skills directory created at ~/.hermes/skills/",
+                    "message": f"No skills found. Skills directory created at {display_hermes_home()}/skills/",
                 },
                 ensure_ascii=False,
             )