[docs] Update README Quickstart to use CLI (#2137)

* update quickstart for new CLI

* add blurb about bleeding edge builds

* missed a yaml reference

* prefer lora over qlora for examples

* fix commands for parity with previous instructions

* consistency on pip/pip3 install

* one more parity pip=>pip3

* remove extraneous options in example yaml

Co-authored-by: NanoCode012 <nano@axolotl.ai>

* update copy

* update badges and for discord and socials in readme

* Fix a few broken links

* bump version to 0.6.0 for release

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Co-authored-by: NanoCode012 <nano@axolotl.ai>

examples/llama-3/qlora-1b.yml

@@ -1,4 +1,4 @@
-base_model: meta-llama/Llama-3.2-1B
+base_model: NousResearch/Llama-3.2-1B
 
 load_in_8bit: false
 load_in_4bit: true
@@ -22,7 +22,6 @@ pad_to_sequence_len: true
 lora_r: 32
 lora_alpha: 16
 lora_dropout: 0.05
-lora_target_linear: true
 lora_fan_in_fan_out:
 lora_target_modules:
   - gate_proj