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)

agent/skill_commands.py

@@ -12,6 +12,8 @@ from datetime import datetime
 from pathlib import Path
 from typing import Any, Dict, Optional
 
+from hermes_constants import display_hermes_home
+
 logger = logging.getLogger(__name__)
 
 _skill_commands: Dict[str, Dict[str, Any]] = {}
@@ -108,7 +110,7 @@ def _inject_skill_config(loaded_skill: dict[str, Any], parts: list[str]) -> None
         if not resolved:
             return
 
-        lines = ["", "[Skill config (from ~/.hermes/config.yaml):"]
+        lines = ["", f"[Skill config (from {display_hermes_home()}/config.yaml):"]
         for key, value in resolved.items():
             display_val = str(value) if value else "(not set)"
             lines.append(f"  {key} = {display_val}")