Update README with build instructions for cmake.

README.md

@@ -1,23 +1,28 @@
-1. Build environment
-    This will download all dependencies needed for pybuda.
-    source env/activate - To load the environment variables for the project.
-    cmake -B env/build env
-    cmake --build env/build
+### Building dependencies
+* `cmake`
+* `clang`
+* `Ninja` - sudo apt-get install ninja-build
 
-2. Build pybuda
-    source env/activate - To load the environment variables for the project and activate the virtual environment.
-    cmake -B build .
-    cmake -G Ninja --build build
+### Building environment
+This is one off step. It will pull all dependencies needed for tt-forge.
 
-3. Running pybuda
-    source env/activate
+* `git submodule update --init --recursive -f`
+* `source env/activate`
+* `cmake -B env/build env`
+* `cmake --build env/build`
 
-Environment variables:
-    TTMLIR_TOOLCHAIN_DIR - points to toolchain dir where dependencies of TTLMIR will be installed. If not defined 
-    it defaults to /opt/ttmlir-toolchain
-    TTMLIR_VENV_DIR - points to virtual environment directory of TTMLIR.If not defined
-    it defaults to /opt/ttmlir-toolchain/venv
-    PYBUDA_TOOLCHAIN_DIR - points to toolchain dir where dependencies of PyBuda will be installed. If not defined
-    it defaults to /opt/pybuda-toolchain
-    PYBUDA_VENV_DIR - points to virtual environment directory of Pybuda. If not defined
-    it defaults to /opt/pybuda-toolchain/venv
+### Build tt-forge
+* `source env/activate`
+* `cmake -G Ninja --build build .`
+* `cmake --build build`
+
+### Cleanup
+* `rm -rf build` - to cleanup tt-forge build artifacts.
+* `./clean_all.sh` - to cleanup all build artifacts (tt-forge/tvm/tt-mlir/tt-metal). This will not remove toolchain dependencies.
+
+### Environment variables:
+* `TTMLIR_TOOLCHAIN_DIR` - points to toolchain dir where dependencies of TTLMIR will be installed. If not defined it defaults to /opt/ttmlir-toolchain
+* `TTMLIR_VENV_DIR` - points to virtual environment directory of TTMLIR.If not defined it defaults to /opt/ttmlir-toolchain/venv
+* `PYBUDA_TOOLCHAIN_DIR` - points to toolchain dir where dependencies of PyBuda will be installed. If not defined it defaults to /opt/pybuda-toolchain
+* `PYBUDA_VENV_DIR` - points to virtual environment directory of tt-forge. If not defined it defaults to /opt/pybuda-toolchain/venv
+* `PYBUDA_PYTHON_VERSION` - set to override python version. If not defined it defaults to python3.10