[skip ci] Revise README for building demos and library package

Updated instructions for building demos and library package installation.

Author: kammce

README.md

@@ -19,48 +19,50 @@ Checkout the
 [🚀 Getting Started](https://libhal.github.io/getting_started/)
 instructions.
 
-## 🏗️ Building Demos
+## 📦 Building & installing the Library Package
 
-To build demos, start at the root of the repo and execute the following command:
+To build and install the package, start at the root of the repo and execute the
+following command:
 
 ```bash
-conan build demos -pr lpc4078 -pr arm-gcc-12.3
+conan create . -pr hal/tc/llvm -pr hal/mcu/stm32f103c8
 ```
 
-or for the `lpc4074`
+To compile the package for the `lpc4078`, simply replace the `stm32f103c8`
+profile with the appropriate profile name. For example:
 
 ```bash
-conan build demos -pr lpc4074 -pr arm-gcc-12.3
+conan create . -pr hal/tc/llvm -pr hal/mcu/lpc4078
 ```
 
-or for the `stm32f103c8`
+To build for you local machine, simply supply the OS
 
 ```bash
-conan build demos -pr stm32f103c8 -pr arm-gcc-12.3
+conan create . -pr hal/tc/llvm -pr hal/os/mac
+conan create . -pr hal/tc/llvm -pr hal/os/linux
+conan create . -pr hal/tc/llvm -pr hal/os/windows
 ```
 
-## 📦 Building & installing the Library Package
+## 🏗️ Building Demos
 
-To build and install the package, start at the root of the repo and execute the
-following command:
+In order to build the demos you must have created `latest` version of the
+package. If you haven't done so, see:
+[📦 Building & installing the Library Package](#-building--installing-the-library-package).
+
+To build demos, start at the root of the repo and execute the following command:
 
 ```bash
-conan create . -pr lpc4078 -pr arm-gcc-12.3 --version=latest
+conan build demos -pr hal/tc/llvm -pr hal/mcu/stm32f103c8
 ```
 
-To compile the package for the `stm32f103c8` or `lpc4074`, simply replace the
-`lpc4078` profile with the appropriate profile name. For example:
+Replace `hal/mcu/stm32f103c8` with:
 
-```bash
-conan create . -pr stm32f103c8 -pr arm-gcc-12.3 --version=latest
-```
+- `hal/mcu/lcp4078`
+- `hal/bare/mod-lpc40-v5`
+- `hal/bare/mod-stm32f1-v5`
 
-> [!NOTE]
-> If you are developing the code, and simply need to test that the package builds
-> and that tests pass, use `conan build .` vs `conan create .`. This will build the
-> package locally in the current directory. You'll find the contents in the
-> `build/` directory at the root of the repo. Now links will point to the code
-> in the repo and NOT the conan package directory.
+Demos are only supported by the platforms listed in the `demos/platforms/`
+directory.
 
 ## 📋 Adding `libhal-expander` to your project