tc-1 Merge last pieces of info from PTHL
* source/compiler_stages/tc_1/code_to_write.rst, * source/compiler_stages/tc_1/faq.rst, * source/compiler_stages/tc_1/given_code.rst, * source/compiler_stages/tc_1/goals.rst, * source/compiler_stages/tc_1/improvements.rst, * source/compiler_stages/tc_1/objects, * source/compiler_stages/tc_1/samples.rst, * source/compiler_stages/tc_1/tc_1.rst: Here.