docs: fix typos and errors in Neutralino.os API reference (closes #452)

[Sakshi-shukla01]

Fixed multiple typos, grammar issues, and inconsistencies in Neutralino.os API reference documentation.

Changes made:

• Fixed spelling: "Accpeted" → "Accepted" (showNotification, showMessageBox ×2, getPath)
• Fixed spelling: "stardard" → "standard" in updateSpawnedProcess
• Fixed grammar: "let" → "lets" in spawnProcess description
• Fixed grammar: "resolve" → "resolves" in execCommand description
• Fixed punctuation: removed double period in getSpawnedProcesses
• Fixed parameter naming: "title" → "name" in getPath
• Added missing trailing period in showNotification icon description
• Corrected type: extensions from String → String[] in showOpenDialog
• Replaced informal wording "aka" with "also known as" in setTray

These changes improve clarity, consistency, and documentation quality.