* Revise build instructions for JS8Call on Linux
Updated references from 'JS8Call-improved' to 'JS8Call' throughout the document, clarified notes regarding Qt version recommendations, and adjusted installation instructions.
* Update API documentation to version 3.0.0
Updated API documentation to version 3.0.0, reflecting changes in API methods and version compatibility.
* Update user guide for JS8Call version 3.0
* Update documentation for building JS8Call on Windows
Normalize that we are JS8Call.
* Revised and refactored building instructions for JS8Call on Windows
Updated instructions for building JS8Call on Windows, including prerequisites, setup for JTSDK64-Tools, and environment configuration for Qt Creator.
* Fix formatting
* Revise JS8Call build instructions for JTSDK64-Tools
* Relocate a line to the proper subheading and minor corrections
Various grammar and punctuation fixes
* Fix a few minor Linux build instructions and grammar
Also, remove redundant README file from the sources and local rigctl / rigctld versions from the build result.
Also, less yelling in the file names in the docs directory.
