Is Sikhi considered the path of knowledge (Giaan Marg) or the path of devotion (Bhakti Marg)?

Sikhi is neither confined to path of knowledge and nor simply to devotation. Sikhi is a complete way of living to have a successful life and become Sachyaar.
ਕਿਵ ਸਚਿਆਰਾ ਹੋਈਐ ਕਿਵ ਕੂੜੈ ਤੁਟੈ ਪਾਲਿ ॥ ਹੁਕਮਿ ਰਜਾਈ ਚਲਣਾ ਨਾਨਕ ਲਿਖਿਆ ਨਾਲਿ ॥੧॥ (੧)
The first sentence of Guru Granth Sahib clearly gives the Definition of Akal Purkh (God) as below: ਅਕਾਲ ਪੁਰਖੁ ਦੀ ਪ੍ਰੀਭਾਸ਼ਾ
ੴ ਸਤਿ ਨਾਮੁ ਕਰਤਾ ਪੁਰਖੁ ਨਿਰਭਉ ਨਿਰਵੈਰੁ ਅਕਾਲ ਮੂਰਤਿ ਅਜੂਨੀ ਸੈਭੰ ਗੁਰ ਪ੍ਰਸਾਦਿ
Hukam and Will of Akal Purkh are very much different from our dictionary which we propagate with each other. Hukam is not the order, as the bosses or elders give to us. Hukam is related with the laws of nature or Rules and regulations of Akal Purkh according to which whole universe is functioning since its origin. Guru Nanak Sahib has clearly defined the principle of Sikhism as
ਹੁਕਮਿ ਰਜਾਈ ਚਲਣਾ ਨਾਨਕ ਲਿਖਿਆ ਨਾਲਿ॥ Jap – 1
Everything or event happens according to His Hukam, i.e. laws of nature.
ਹੁਕਮੈ ਅੰਦਰਿ ਸਭੁ ਕੋ ਬਾਹਰਿ ਹੁਕਮ ਨ ਕੋਇ ॥ Jap – 1
There are reasons for each and every incidence or happening. We have to analyze them in detail at physical and mental level. Hukam operating at physical level can be understood with the help of science and other fields. Hukam operating at mental level can be understood with the help of Guru Granth Sahib.
Please also note that, the Will (ਰਜਾ) of Akal Purkh is not like our will and wish, but it is a deep-rooted Hukam, which is beyond our limits of understanding. We can understand the physical laws to some extent with the help of science. But we have to study Guru Granth Sahib to understand the laws applicable at mental level.
ਹੁਕਮੁ ਨ ਜਾਣੈ ਬਹੁਤਾ ਰੋਵੈ ॥ ਅੰਦਰਿ ਧੋਖਾ ਨੀਦ ਨ ਸੋਵੈ ॥
Anyone who does not try to understand the Hukam of the Akal Purkh according to which the whole universe is functioning both at mental level and physical level, keeps on suffering in his life. Such a person remains in the illusion and does not lead a comfortable and peaceful life.
We have to perform our duties according to His system. If we do not put food in our mouth, nobody is going to do for us. We have to work for our livelihood and also live in a coordinated system for a peaceful life.
All types of aspects of life have been described in Guru Granth Sahib.
We can get enlightened and lead a comfortable and successful life by understanding and following the Gurbani written in Guru Granth Sahib.
ਗੁਰਬਾਣੀ ਇਸੁ ਜਗ ਮਹਿ ਚਾਨਣੁ ਕਰਮਿ ਵਸੈ ਮਨਿ ਆਏ ॥੧॥ – 67
Please start studying Gurbani in a systematic manner. All the questions will get clarified during this process automatically.

ਗੁਰਮਤਿ ਦੀ ਖੋਜ ਸਬੰਧੀ ਹੋਰ ਵਿਸ਼ਿਆਂ ਤੇ ਜਾਣਕਾਰੀ ਹਾਸਲ ਕਰਨ ਲਈ ਕਿਰਪਾ ਕਰਕੇ ਇਸ ਲਿੰਕ ਤੇ ਕਲਿਕ ਕਰੋ ਜੀ
Please visit this website to get more information about research on Gurbani.
https://gurmat-research.com/